b b <<f>> {5, a c b, f - <<W8>> f} a <<chik>> b <<sync>>
b b <<f>>{5, a c b <<W7>>, f - <<W8>> f} a <<chik>> b
{b b b<<W1>>,a a} - b
Here I checked that the silence メ-モ is really played
{b b b<<W1>>,a a<<W7>> <<W8>>} b
Here, BP2 creates a dummy silence after メa aモ, therefore when <<W7>> and <<W8>> are hanging the first event of メbモ has already been played. Of course this is a quite meaningless situation!